Income Taxes (Details)		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Federal statutory rate, percent		21.00%	21.00%
State tax (net of federal tax effect), percent		2.00%	2.50%
Wind PTCs, percent	[1]	(28.80%)	(31.40%)
Plant regulatory differences, percent	[2]	(4.40%)	(3.40%)
Other tax credits, percent		0.20%	0.30%
Other (net), percent		(1.00%)	0.00%
Effective income tax rate, percent		(11.00%)	(11.00%)

[1] Wind PTCs net of estimated transfer discounts. Gross wind PTCs are credited to customers (reduction to revenue) and do not materially impact net income.

[2] Plant regulatory differences primarily relate to the credit of excess deferred taxes to customers. Income tax benefits associated with the credit are offset by corresponding revenue reductions.